mautrix-signal/pkg/connector/login.go
2024-08-07 15:14:13 +03:00

187 lines
5.7 KiB
Go

// mautrix-signal - A Matrix-Signal puppeting bridge.
// Copyright (C) 2024 Tulir Asokan
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <https://www.gnu.org/licenses/>.
package connector
import (
"context"
"fmt"
"github.com/google/uuid"
"maunium.net/go/mautrix/bridge/status"
"maunium.net/go/mautrix/bridgev2"
"maunium.net/go/mautrix/bridgev2/database"
"go.mau.fi/mautrix-signal/pkg/signalid"
"go.mau.fi/mautrix-signal/pkg/signalmeow"
"go.mau.fi/mautrix-signal/pkg/signalmeow/store"
)
func (s *SignalConnector) GetLoginFlows() []bridgev2.LoginFlow {
return []bridgev2.LoginFlow{{
Name: "QR",
Description: "Scan a QR code to pair the bridge to your Signal app",
ID: "qr",
}}
}
func (s *SignalConnector) CreateLogin(ctx context.Context, user *bridgev2.User, flowID string) (bridgev2.LoginProcess, error) {
if flowID != "qr" {
return nil, fmt.Errorf("invalid login flow ID")
}
return &QRLogin{User: user, Main: s}, nil
}
type QRLogin struct {
User *bridgev2.User
Main *SignalConnector
cancelChan context.CancelFunc
ProvChan chan signalmeow.ProvisioningResponse
ProvData *store.DeviceData
}
var _ bridgev2.LoginProcessDisplayAndWait = (*QRLogin)(nil)
func (qr *QRLogin) Cancel() {
qr.cancelChan()
go func() {
for range qr.ProvChan {
}
}()
}
const (
LoginStepQR = "fi.mau.signal.login.qr"
LoginStepProcess = "fi.mau.signal.login.processing"
LoginStepComplete = "fi.mau.signal.login.complete"
)
func (qr *QRLogin) Start(ctx context.Context) (*bridgev2.LoginStep, error) {
log := qr.Main.Bridge.Log.With().
Str("action", "login").
Stringer("user_id", qr.User.MXID).
Logger()
provCtx, cancel := context.WithCancel(log.WithContext(context.Background()))
qr.cancelChan = cancel
// Don't use the start context here: the channel will outlive the start request.
qr.ProvChan = signalmeow.PerformProvisioning(provCtx, qr.Main.Store, qr.Main.Config.DeviceName)
var resp signalmeow.ProvisioningResponse
select {
case resp = <-qr.ProvChan:
if resp.Err != nil || resp.State == signalmeow.StateProvisioningError {
return nil, resp.Err
} else if resp.State != signalmeow.StateProvisioningURLReceived {
return nil, fmt.Errorf("unexpected state %v", resp.State)
}
case <-ctx.Done():
cancel()
return nil, ctx.Err()
// TODO separate timeout here?
}
return &bridgev2.LoginStep{
Type: bridgev2.LoginStepTypeDisplayAndWait,
StepID: LoginStepQR,
Instructions: "Scan the QR code on your Signal app to log in",
DisplayAndWaitParams: &bridgev2.LoginDisplayAndWaitParams{
Type: bridgev2.LoginDisplayTypeQR,
Data: resp.ProvisioningURL,
},
}, nil
}
func (qr *QRLogin) Wait(ctx context.Context) (*bridgev2.LoginStep, error) {
if qr.ProvChan == nil {
return nil, fmt.Errorf("login not started")
}
if qr.ProvData == nil {
return qr.qrWait(ctx)
} else {
return qr.processingWait(ctx)
}
}
func (qr *QRLogin) qrWait(ctx context.Context) (*bridgev2.LoginStep, error) {
select {
case resp := <-qr.ProvChan:
if resp.Err != nil || resp.State == signalmeow.StateProvisioningError {
qr.cancelChan()
return nil, resp.Err
} else if resp.State != signalmeow.StateProvisioningDataReceived {
qr.cancelChan()
return nil, fmt.Errorf("unexpected state %v", resp.State)
} else if resp.ProvisioningData.ACI == uuid.Nil {
qr.cancelChan()
return nil, fmt.Errorf("no signal account ID received")
}
qr.ProvData = resp.ProvisioningData
return &bridgev2.LoginStep{
Type: bridgev2.LoginStepTypeDisplayAndWait,
StepID: LoginStepProcess,
Instructions: fmt.Sprintf("Processing login as %s...", resp.ProvisioningData.Number),
DisplayAndWaitParams: &bridgev2.LoginDisplayAndWaitParams{
Type: bridgev2.LoginDisplayTypeNothing,
},
}, nil
case <-ctx.Done():
qr.cancelChan()
return nil, ctx.Err()
}
}
func (qr *QRLogin) processingWait(ctx context.Context) (*bridgev2.LoginStep, error) {
defer qr.cancelChan()
newLoginID := signalid.MakeUserLoginID(qr.ProvData.ACI)
select {
case resp := <-qr.ProvChan:
if resp.Err != nil || resp.State == signalmeow.StateProvisioningError {
return nil, resp.Err
} else if resp.State != signalmeow.StateProvisioningPreKeysRegistered {
return nil, fmt.Errorf("unexpected state %v", resp.State)
}
case <-ctx.Done():
return nil, ctx.Err()
}
ul, err := qr.User.NewLogin(ctx, &database.UserLogin{
ID: newLoginID,
RemoteName: qr.ProvData.Number,
RemoteProfile: status.RemoteProfile{
Phone: qr.ProvData.Number,
},
}, &bridgev2.NewLoginParams{
DeleteOnConflict: true,
})
if err != nil {
return nil, fmt.Errorf("failed to create user login: %w", err)
}
backgroundCtx := ul.Log.WithContext(context.Background())
err = ul.Client.Connect(backgroundCtx)
if err != nil {
return nil, fmt.Errorf("failed to connect after login: %w", err)
}
return &bridgev2.LoginStep{
Type: bridgev2.LoginStepTypeComplete,
StepID: LoginStepComplete,
Instructions: fmt.Sprintf("Successfully logged in as %s / %s", qr.ProvData.Number, qr.ProvData.ACI),
CompleteParams: &bridgev2.LoginCompleteParams{
UserLoginID: ul.ID,
UserLogin: ul,
},
}, nil
}